Search for High-Mass Resonances Decaying toeμinpp¯Collisions ats=1.96

Abstract

We describe a general search for resonances decaying to a neutral emu final state in pp collisions at a center-of-mass energy of 1.96 TeV. Using a data sample representing 344 pb(-1) of integrated luminosity recorded by the Collider Detector at Fermilab II experiment, we compare standard model predictions with the number of observed events for invariant masses between 50 and 800 GeV/c2. Finding no significant excess (5 events observed vs 7.7 +/- 0.8 expected for M(emu) > 100 GeV/c2 ), we set limits on sneutrino and Z' masses as functions of lepton family number violating couplings.

Probe R-parity violating stop resonance at the LHeC

“…Contrary to the pair productions of SUSY particles in the R-conserved frame, the RPV resonance production at colliders would dramatically reduce the threshold of probing new physics. There were studies of sneutrino resonance production and decay at next generation e + e − linear colliders [5] and at hadron colliders by both theoretical discussion [6][7][8] and experimental measurements at the Tevatron [9,10], via lepton flavor violating L L Ê and L Q D interactions. For single squark production, stringently constrained by indirect low energy nucleon experiments, the baryon number violating Û D D couplings are negligibly small, for example λ ′′ 11k are less than 10 −7 given by nucleon-antinucleon oscillation measurements, and thus mechanics of RPV squark resonance production at TeV hadron colliders are highly suppressed.…”

Search forR-Parity Violating Decays of Sneutrinos toeμ,μτ, andeτAaltonen1, Adelman2, González3 et al. 2010Phys. Rev. Lett.Self Cite230120View full textAdd to dashboardCite

“…Recently, searches for heavy sneutrinos decaying into the e final state have been performed by the CDF [10] and D0 collaborations [11]. The results in this Letter supersede [10]. This analysis also represents the first search for lepton-flavor-violating decays of heavy sneutrinos into final states involving a third generation lepton, the , at the Tevatron.…”

“…Heavy sneutrinos have been extensively searched for at LEP [9]. Recently, searches for heavy sneutrinos decaying into the e final state have been performed by the CDF [10] and D0 collaborations [11]. The results in this Letter supersede [10].…”

A case study of the sensitivity to LFV operators with precision measurements and the LHC

“…Even its current limit on Λ assuming direct nuclear mediation is two orders of magnitude higher than that from the 14 TeV projection of the LHC. The limits certainly will be further improved by the two proposed experiments, Mu2E [12; 13] at FNAL and COMET [14; 15] at J-PARC, which aim to improve the sensitivity of µ-e conversion in 48 Ti down to 10 −16 , and possibly even to 10 −18 in a future proposed experiment PRISM/PRIME [14; 15]. For eτ and µτ , pion and Kaon decays and semi-leptonic τ decays places the strongest constraints for the light quark flavours.…”